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Runspace10 Sample

This sample shows how to create a default initial session state, how to add a cmdlet to the InitialSessionState, how to create a runspace that uses the initial session state, and how to run the command by using a PowerShell object.

Extracting properties from the PSObject objects returned by the command.

Example

This sample creates a runspace that uses an InitialSessionState object to define the elements that are available when the runspace is opened. In this sample, the Get-Proc cmdlet (defined by the Host application) is added to the initial session state, and the cmdlet is run synchronously by using a PowerShell object.

namespace Microsoft.Samples.PowerShell.Runspaces
{
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Management.Automation;
using System.Management.Automation.Runspaces;
using PowerShell = System.Management.Automation.PowerShell;
#region GetProcCommand
///<summary>/// Class that implements the GetProcCommand.///</summary>
[Cmdlet(VerbsCommon.Get, "Proc")]
publicclass GetProcCommand : Cmdlet
{
#region Cmdlet Overrides
///<summary>/// For each of the requested process names, retrieve and write/// the associated processes.///</summary>protectedoverridevoid ProcessRecord()
{
// Get the current processes.
Process[] processes = Process.GetProcesses();
// Write the processes to the pipeline making them available// to the next cmdlet. The second argument (true) tells the // system to enumerate the array, and send one process object // at a time to the pipeline.
WriteObject(processes, true);
}
#endregion Overrides
} // End GetProcCommand class.#endregion GetProcCommand
///<summary>/// This class contains the Main entry point for this host application.///</summary>internalclass Runspace10
{
///<summary>/// This sample shows how to create a default initial session state, how to add /// add a cmdlet to the InitialSessionState object, and then how to create /// a Runspace object.///</summary>///<param name="args">Parameter is not used.</param>/// This sample demonstrates:/// 1. Creating an InitialSessionState object./// 2. Adding a cmdlet to the InitialSessionState object./// 3. Creating a runspace that uses the InitialSessionState object./// 4. Creating a PowerShell object that uses the Runspace object./// 5. Running the added command synchronously./// 6. Working with PSObject objects to extract properties /// from the objects returned by the pipeline.privatestaticvoid Main(string[] args)
{
// Create a default InitialSessionState object. The default // InitialSessionState object contains all the elements provided // by Windows PowerShell.
InitialSessionState iss = InitialSessionState.CreateDefault();
// Add the get-proc cmdlet to the InitialSessionState object.
SessionStateCmdletEntry ssce = new SessionStateCmdletEntry("get-proc", typeof(GetProcCommand), null);
iss.Commands.Add(ssce);
// Create a Runspace object that uses the InitialSessionState object. // Notice that no PSHost object is specified, so the default host is used. // See the Hosting samples for information on creating your own custom host.using (Runspace myRunSpace = RunspaceFactory.CreateRunspace(iss))
{
myRunSpace.Open();
using (PowerShell powershell = PowerShell.Create())
{
powershell.Runspace = myRunSpace;
// Add the get-proc cmdlet to the pipeline of the PowerShell object.
powershell.AddCommand("get-proc");
Collection<PSObject> results = powershell.Invoke();
Console.WriteLine("Process HandleCount");
Console.WriteLine("--------------------------------");
// Display the output of the pipeline.foreach (PSObject result in results)
{
Console.WriteLine(
"{0,-20} {1}",
result.Members["ProcessName"].Value,
result.Members["HandleCount"].Value);
}
}
// Close the runspace to release resources.
myRunSpace.Close();
}
System.Console.WriteLine("Hit any key to exit...");
System.Console.ReadKey();
}
}
}